Need component source for AlephX...

batee · 12th August 2004, 09:20 PM

Anyone have a source for the .22Ohm 3W resistors that the Hifizen board schematic calls for?

Or better yet, so I don't have to buy from four distributors, is anyone compiling and selling a set of components?

Thanks in advance.

Nelson Pass · 12th August 2004, 09:59 PM

You can get the Panasonic 3 watt .47 ohm resistors from
Digikey, and parallel 2 of them.

tomchaoda · 13th August 2004, 01:34 AM

How about in mouser.com and look for this part "71-RS2B-0.25"?

It is 0.25 ohms at 3W and sell for $1.08 per piece.

Thomas

Apex Jr · 13th August 2004, 01:46 AM

I have a large stock of these....
.2 ohm 3 Watt Dale RS 2B There .20 ea and $15.00/100
Problem is I have a $20.00 minimum order.
Check my website for other items for the Aleph X Amp
www.apexjr.com

Steve

batee · 13th August 2004, 05:34 AM

Should I be concerned that some of the recommendations are wirewound resistors?

I like Nelson's parallel resistors solution. Probably sound more open and airy that way...

Bryan

GRollins · 13th August 2004, 05:51 PM

You can go Nelson's route or check Mouser for the Caddock resistors. They are more expensive than the Panasonic parts. When I did the Aleph-X prototype design, I sometimes used single resistors and sometimes parallel ones, depending on how I was trying to torture the circuit that day.
For smaller Aleph-X versions, the Caddocks won't hurt too badly. For larger ones--where you've got lots of output devices--the price mounts quickly. In that case consider using the Panasonic resistors for the MOSFET Sources and Caddock resistors for the output (use the resistance value of all the current sensing array resistors in parallel) and the resistors from outputs to ground. Depending on the number of resistors, it is actually sometimes cheaper to buy one Caddock than a bunch of Panasonics to run in parallel.

Grey

12th August 2004, 09:20 PM	#1
batee diyAudio Member Join Date: Mar 2004 Location: Rolla, MO	Need component source for AlephX... Anyone have a source for the .22Ohm 3W resistors that the Hifizen board schematic calls for? Or better yet, so I don't have to buy from four distributors, is anyone compiling and selling a set of components? Thanks in advance.

13th August 2004, 01:46 AM	#4
Apex Jr diyAudio Member Join Date: Jun 2002 Location: Torrance, Calif	IN STOCK I have a large stock of these.... .2 ohm 3 Watt Dale RS 2B There .20 ea and $15.00/100 Problem is I have a $20.00 minimum order. Check my website for other items for the Aleph X Amp www.apexjr.com Steve

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12th August 2004, 09:59 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	You can get the Panasonic 3 watt .47 ohm resistors from Digikey, and parallel 2 of them.

13th August 2004, 01:34 AM	#3
tomchaoda diyAudio Member Join Date: Sep 2003 Location: New Jersey	How about in mouser.com and look for this part "71-RS2B-0.25"? It is 0.25 ohms at 3W and sell for $1.08 per piece. Thomas

13th August 2004, 05:34 AM	#5
batee diyAudio Member Join Date: Mar 2004 Location: Rolla, MO	Should I be concerned that some of the recommendations are wirewound resistors? I like Nelson's parallel resistors solution. Probably sound more open and airy that way... Bryan

13th August 2004, 05:51 PM	#6
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	You can go Nelson's route or check Mouser for the Caddock resistors. They are more expensive than the Panasonic parts. When I did the Aleph-X prototype design, I sometimes used single resistors and sometimes parallel ones, depending on how I was trying to torture the circuit that day. For smaller Aleph-X versions, the Caddocks won't hurt too badly. For larger ones--where you've got lots of output devices--the price mounts quickly. In that case consider using the Panasonic resistors for the MOSFET Sources and Caddock resistors for the output (use the resistance value of all the current sensing array resistors in parallel) and the resistors from outputs to ground. Depending on the number of resistors, it is actually sometimes cheaper to buy one Caddock than a bunch of Panasonics to run in parallel. Grey

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